EDS460-D-1 Insulation fault locators with control and display

Description

EDS460-D-1 Insulation fault locators with control and display

Product description
The insulation fault locators ISOSCAN® EDS460/490 in combination with the ISOMETER®
IRDH575 or the locating current injector PGH are applied for localising insulation faults in
unearthed systems (IT systems). The locating current signals generated by the insulation
monitoring device IRDH575 or the locating current injector PGH are detected by measuring current transformers

and evaluated by the insulation fault locators. Up to 12 measuring current transformers can be connected

to one EDS460/490. A total of 90 EDS insulation fault locators can be connected via one RS-485 interface (BMS protocol). Hence, up
to 1080 circuits can be monitored. The maximum scanning time is …10 s, see TGH1394.
Application
• Insulation fault location in AC, AC/DC and DC IT systems
• Main and control circuits in industrial plants and ships
• Diode-decoupled DC IT systems in power stations
• Systems for medical locations

EDS460-D-1

Function
Insulation fault location is started manually or automatically via the ISOMETER® IRDH575 or
the PGH. Once started, the insulation fault locator EDS simultaneously scans all measuring
current transformers (channels). If several EDS exist, these devices are also scanned simultaneously.
When the locating current detected by a measuring current transformer exceeds the set
response value, the alarm LED 2 lights up, the common alarm relay switches and the faulty
circuit is indicated as plain text on the graphical display. Version EDS…L indicates faulty
outgoing circuits via alarm LEDs. The connection between the measuring current transformer
and the insulation fault locator is continuously monitored. In the event of wire interruption,
the alarm LED 1 lights up and the alarm relay switches.
With the fault memory activated, the alarm messages of the individual channels remains
stored until the reset button is pressed or until a reset command is given via the RS-485
interface. When the fault memory is deactivated, the alarm message remains stored until
the insulation fault is eliminated.

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